:root {
  --bg: #111; --panel: #161616; --border: #3a3a3a; --text: #d8d8d8;
  --muted: #888; --link: #8fb8ff;
}
* { box-sizing: border-box; }
body { background: var(--bg); color: var(--text); font-family: ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace; font-size: 13px; margin: 0; }
a { color: var(--link); }
header { padding: 0.6rem 1rem; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
header h1 { font-size: 1rem; margin: 0; font-weight: 600; }
nav a { margin-right: 1rem; color: var(--muted); text-decoration: none; }
nav a.active, nav a:hover { color: var(--text); text-decoration: underline; }
main { max-width: 1000px; margin: 0 auto; padding: 1rem; }
.panel { border: 1px solid var(--border); padding: 0.75rem; margin-bottom: 1rem; }
h2 { font-size: 0.85rem; margin: 0 0 0.6rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }
.meta { color: var(--muted); }

/* login */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-wrap { width: 320px; }
.login-brand { text-align: center; margin-bottom: 1rem; }
.login-brand h1 { font-size: 1.1rem; margin: 0.3rem 0 0; }
.login-card { border: 1px solid var(--border); padding: 1rem; }
.login-card label { display: block; font-size: 0.75rem; color: var(--muted); margin: 0.5rem 0 0.2rem; }
input, textarea, select { width: 100%; background: #0a0a0a; border: 1px solid var(--border); color: var(--text); padding: 0.4rem; font-family: inherit; font-size: inherit; }
textarea { resize: vertical; }
.btn { background: #222; color: var(--text); border: 1px solid var(--border); padding: 0.4rem 0.8rem; font-family: inherit; font-size: inherit; cursor: pointer; }
.btn:hover { background: #2a2a2a; }
.btn.small { padding: 0.2rem 0.5rem; font-size: 0.78rem; }
.btn.neutral { background: #1a1a1a; }
.btn.danger { border-color: #772222; color: #e08080; }
#msg.err { color: #e08080; margin-top: 0.4rem; }
#msg.ok { color: #8fc98f; margin-top: 0.4rem; }

/* dense tables */
table.data { width: 100%; border-collapse: collapse; }
table.data th, table.data td { border: 1px solid var(--border); padding: 0.35rem 0.5rem; text-align: left; vertical-align: top; }
table.data th { color: var(--muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.02em; }
table.data tr.blocked { color: var(--muted); }
table.data tr.done { color: var(--muted); text-decoration: line-through; }
.tag { font-size: 0.75rem; color: var(--muted); }
.tag.hard { color: #e08080; }
.tag.soft { color: #d0b060; }
.col-actions { white-space: nowrap; width: 1%; }

/* when2meet grid - grayscale, no color coding beyond intensity */
.grid-wrap { overflow-x: auto; }
.avail-grid { border-collapse: collapse; user-select: none; }
.avail-grid th, .avail-grid td { border: 1px solid var(--border); width: 26px; height: 18px; text-align: center; font-size: 0.65rem; color: var(--muted); }
.avail-grid td.slot { cursor: pointer; background: #0a0a0a; }
.avail-grid td.slot.available { background: #555; }
.avail-grid td.slot.maybe { background: #333; }
.heat-0 { background: #0a0a0a; } .heat-1 { background: #2a2a2a; } .heat-2 { background: #444; }
.heat-3 { background: #666; } .heat-4 { background: #999; }

form.inline { display: inline; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.form-grid label { font-size: 0.75rem; color: var(--muted); display: block; margin-bottom: 0.15rem; }
.empty { color: var(--muted); padding: 0.4rem 0; }